1. Symbiostock -> Author Options -> Model Released? / Property Released?

Whatever changes I make there, new processed images will by default always show YES on both options, model and property release.
Is that a bug or am I doing something wrong. Or do I not understand what the MR/PR setting in the Author Options is supposed to do?

2. Theoretical question: Will ALL Author Options be applied to ALL images if I'd check "Update all existing images with new values?"
That would make this option pretty useless, if you would want to change only one or a few settings, wouldn't it?
For example, if you would want to change the pricing for all images you would automatically also change the PR/MR status, right?

They don't do anything (yet).   I fill them in anyway in case they are activated - as Exclusive was the other day

Yeah, but that's the point. I would like to have the PR/MR status set correctly when I upload/edit my images so I don't have to do it later again (when it does do something).

But the "global/default" option (Author Options") simply doesn't work.

I usually upload images in batches of sessions and would like to have my images properly processed so I don't have to change the MR/PR status manually.

Do it at the same time as you do your seo edits?

I do because I have to. If I could set the default option correctly BEFORE I start uploading/processing a batch then I wouldn't NEED to do it again individually.